C#语言有很多值得学习的地方,这里我们主要介绍C# Employee对象,包括介绍所有雇员数据的命令等方面。
C# Employee对象
本文用代码片断演示了怎样获取C# Employee对象的所有内容,包括ACME_DIVISION字典中的部门经理的名字。如果有时间的话,请阅读一下其中的代码来看看它是怎么使用的。它可以被直接放到你的类中并可以运行。命令的名字是PRINTOUTEMPLOYEE。ListEmployee()函数接收一个ObjectId参数,它通过一个ref类型的字符串数组返回值(包含相应的雇员数据)。调用它的PrintoutEmployee()函数只是用来在命令行中输出这些数据。
我们需要一个遍历并显示所有雇员数据的命令。
- public static void ListEmployee(ObjectId employeeId, ref string[] saEmployeeList)
- {
- int nEmployeeDataCount = 0;
- Database db = HostApplicationServices.WorkingDatabase;
- Transaction trans = db.TransactionManager.StartTransaction(); //开始事务处理。
- try
- {
- Entity ent = (Entity)trans.GetObject(employeeId, OpenMode.ForRead, false);
- //打开当前对象!
- if (ent.GetType() == typeof(BlockReference))
- {
- //不是所有的块索引都有雇员数据,所以我们要处理错误
- bool bHasOurDict = true;
- Xrecord EmployeeXRec = null;
- try{
- BlockReference br = (BlockReference)ent;
- DBDictionary extDict = (DBDictionary)trans.GetObject
(br.ExtensionDictionary, OpenMode.ForRead, false);- EmployeeXRec = (Xrecord)trans.GetObject(extDict.GetAt("EmployeeData"),
OpenMode.ForRead, false);- }
- catch
- {
- bHasOurDict = false; //出现了错误……字典或扩展记录不能访问
- }
- if (bHasOurDict) //如果获得扩展字典,而又有扩展记录……
- {
- // 为雇员列表分配内存
- saEmployeeList = new String[4];
- //加入雇员的名字
- TypedValue resBuf = EmployeeXRec.Data.AsArray()[0];
- saEmployeeList.SetValue(string.Format("{0}\n", resBuf.Value),
nEmployeeDataCount);- nEmployeeDataCount += 1;
- //加入雇员的薪水
- resBuf = EmployeeXRec.Data.AsArray()[1];
- saEmployeeList.SetValue(string.Format("{0}\n", resBuf.Value),
nEmployeeDataCount);- nEmployeeDataCount += 1;
- //加入雇员所在的部门
- resBuf = EmployeeXRec.Data.AsArray()[2];
- string str = (string)resBuf.Value;
- saEmployeeList.SetValue(string.Format("{0}\n", resBuf.Value),
nEmployeeDataCount);- nEmployeeDataCount += 1;
- //现在,让我们从公司字典中获取老板的名字
- //在NOD中找到.
- DBDictionary NOD = (DBDictionary)trans.GetObject(db.NamedObjectsDictionaryId,
OpenMode.ForRead, false);- DBDictionary acmeDict = (DBDictionary)trans.GetObject(NOD.GetAt("ACME_DIVISION"),
OpenMode.ForRead);- //注意我们直接使用扩展数据...
- DBDictionary salesDict = (DBDictionary)trans.GetObject(acmeDict.GetAt
((string)EmployeeXRec.Data.AsArray()[2].Value),OpenMode.ForRead);- Xrecord salesXRec = (Xrecord)trans.GetObject(salesDict.GetAt("Department Manager"),
OpenMode.ForRead);- //***,把雇员的数据输出到命令行
- resBuf = salesXRec.Data.AsArray()[0];
- saEmployeeList.SetValue(string.Format("{0}\n", resBuf.Value), nEmployeeDataCount);
- nEmployeeDataCount += 1;
- }
- }
- trans.Commit();
- }
- finally
- {
- trans.Dispose();
- }
- }
- [CommandMethod("PRINTOUTEMPLOYEE")]
- public static void PrintoutEmployee()
- {
- Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
- //声明我们将在下面使用的工具...
- Database db = HostApplicationServices.WorkingDatabase;
- Transaction trans = db.TransactionManager.StartTransaction();
- try
- {
- //首先,获取块表和模型空间块表记录
- BlockTable bt = (BlockTable)trans.GetObject(HostApplicationServices.
WorkingDatabase.BlockTableId, OpenMode.ForRead);- BlockTableRecord btr = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace],
OpenMode.ForRead);- //现在,我们需要把内容输出到命令行。这里可以有一个对象帮助我们:
- //下面的部分,我们将遍历模型空间:
- foreach (ObjectId id in btr)
- {
- Entity ent = (Entity)trans.GetObject(id, OpenMode.ForRead, false); //打开当前对象!
- if (ent is BlockReference)
- {
- string[] saEmployeeList = null;// 这是正确的...定义新的列表。
- ListEmployee(id, ref saEmployeeList);
- if ((saEmployeeList.Length == 4))
- {
- ed.WriteMessage("Employee Name: {0}", saEmployeeList[0]);
- ed.WriteMessage("Employee Salary: {0}", saEmployeeList[1]);
- ed.WriteMessage("Employee Division: {0}", saEmployeeList[2]);
- ed.WriteMessage("Division Manager: {0}", saEmployeeList[3]);
- }
- }
- }
- }
- finally
- {
- }
- }
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